This is a very creative game. The gameplay is engaging and while the answer is kind of obvious in some stages, the later stages got my brain working. It probably also took a lot of work to make the AIs for both the hero and the squares (or... don't tell me Unity has got a built-in pathfinding algorithm?)
However, it is not very polished visually. Some part of the loud sections of the stage music also kind of stings my eardrum and not very pleasant to listen to... Is this just me? (^.^;
I also have one big complaint regarding the gameplay: I think you should've made it so that the "target"'s location is at the last place where you failed upon restarting, or make it move faster, or at least the target's starting place shouldn't have been placed in such an annoying place for stage 4 and 5. The location is so far away from the likely place the target is supposed to be put, and every time I fail, I have to move it again from the place that's obviously so far from the answer -- and I find that to be quite... an unnecessary waste of time.
I hope I didn't sound too harsh. I enjoyed the game, and this feedback is meant to be constructive.
P.S.: forgot to mention this but also, I think the WSAD control also doesn't work despite what is said in the tutorial stage.
TL;DR: I think this is a great concept, but the execution and polish can have a lot of improvement.